Technically, if you ve implemented steel storm eating mana on hit/when hit its cool, but
in accordance with all other spells, it should eat mana only when hit/on hit.
not when cast at the start of combat due to pallida?
Other option would be making all spell gems cast automatically consume their mana cost. but i didnt say it, will be a gamechanger.
Also, if its consumes life instead of mana, you can do a suicide trigger team now?